Ladle-stopper.



N0. 7|2,|l|. Patente'd Oct. 28, I902.

J. H. ALLENDORFER.

LADLE STDPPER.

(Application filed Maylo, 1902M (No Model.)

WITNESSES, INVENTOR.

S 256,. mam/Q, 7(03/ Arm/Ma 1m: NORRIS PETERS ca, PKGTO-LITHO.. wAsmNc-ToN n. c

UNITED STATES PATENT OFFICE,

JOHN H. ALLENDORFER, OF WESTMON'I, PENNSYLVANIA.

LADLE-ISTOPPER.

SPECIFICATION forming part of Iletters Patent N 0. 712,111, dated October 28, 1902.

Application filed May 10, 1902. Serial No. 106,836. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. ALLENDORFER,

a resident of the borough of Westmont, in the county of Cambria and State of Pennsylvania, (my post ofiice address being Johnstown, 1ennsylvania,) have invented certain new and useful Improvements in Ladle-Stoppers; and Ido hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I I

In the art of founding steel and other metals it has been customary to employ ladles provided with a pouring-nozzle of refractory material located in the bottom thereof, said nozzle being closed and opened by means of a refractory stopper secured to a stopper-rod, which in operation is immersed in molten metal contained in the ladle.

Certain of the objects of my invention are r to provide a stopper of improved form and construction which may be economically manufactured, easily and simply applied and adapted to its purpose, solid and strong in all its parts, so designed as to provide ample protection to the stopper-rod upon which it is secured, and to accomplish these purposes my invention consists of certain details of construction, as will hereinafter more fully appear.

Certain styles of stoppers heretofore used have been seen red to the stopper rod by means of a bolt'passing through a hole extending the entire length of the stopper, said bolt being keyed to the stopper-rod, and the remainder of the opening after said key-bolt has been introduced has been plugged with refractory material. The result of this style of construction is that the plug of refractory material may become loose or broken on ac count of the severe use and extreme heat to which it is subjected, which thus permits the molten metal to have access to, the key-bolt or the stopper-rod, with the result of heating or burning them in such a way as to cause a failure of this important piece of apparatus,

and for these reasons a stopper constructed in the old style, as above indicated, can only be used for one or at the most two or three heats.

By means of my improved construction,

difliculty or danger and in many instances have made more than this.

My improved stopper consists of a plug of refractory material having a metallic nut embedded therein into which the threaded end of a stud-bolt is inserted andscrewed fast, the other end of said stud-bolt being provided with a somewhat similarbut longer thread, which is screwed into a threaded recess in the bottom of the body of the stopper-rod. The use of the metallic nut in my improved stopper provides a large bearing-surface between said metallic portion and the softer refractory material of the stopper for securing the same to the stopper-rod, thus adding to the strength and stiffness of the construction, and as a stud-bolt is a simple straight pieceof round iron or steel it is easily and cheaply manufactured, besides which being removable and distinct from the body of the stopper-rod said stud-bolt can be easily and very cheaply replaced by a new one when necessary without interfering with or doing any work upon the body of the stopper-rod proper. I consider the useof-the stud-bolt in this connection as an important feature of my invention, for the reason that being separate and distinct from the body of the stopper-rod and of a simple and ordinary form of construction it becomes only a matter of trifling expense to renew it when necessary on account of wear orother the heat of the molten metal which surrounds them, as is the case with rods and connections of smaller sizes.

My improved stopper may also be provided with a recess formed therein at its upper portion, into which the main body of the stop- IOO per-rod is inserted, the refractory material surrounding said recess being so arranged as to form an external shoulder of less diameter than the body of the stopper, thus providing a seat and joint for the refractory sleeve, which in practice covers and protects the main body of the stopper-rod.

Having thus given a general description of my invention, its objects, and nature, I will now in order to make these more clear refer to the annexed sheet of drawings, which forms part of this specification, and in which like letters refer to like parts.

Figure 1 is a central vertical cross-sectional.

elevation of myimproved stopper, including a metallic nut embedded therein, in conneo tion with a stud-bolt for securing the same to the stopper-rod. Fig. 2 is a bottomplan View of the construction shown in Fig. 1.

Referring now to the letters of reference upon the drawings, A is the stopper, composed of refractory material.

B is the upper or body portionof the stop per-rod.

- C isa stud-bolt threaded at both ends, as shown.

Dis a metallic nut embedded in the refractory stopper in the position indicated.

E ista projection or shoulder on the stopper having the shape of a conical surface, as shown, to form a joint or seal in connection with the usual stopperrod sleeve. (Not shown.)

F is a cylindrical recess in the top of the stopper, into which the end of the stopperrod B is inserted.

G-isan opening in the body of the stopper through which the stud-bolt C is inserted.

Having thus described my invention, what I claim, and desire to secure by United. States Letters Patent, is-

1. A refractory stopper provided with a threaded metallic nut secured therein, and a hole communicating with the threaded open ing of the nut aforesaid, a stud-bolt adapted to be screwed into the nut aforesaid, and a stopper-rod having a threaded hole arranged to receive the other end of said stud-bolt, whereby said stopper is secured to said stopperrod.

2. A refractory stopper provided with a threaded metallic nut secured therein and a hole communicating with the threaded opening of the nut aforesaid, said hole having an enlarged recess at its upper end, a stud-bolt adapted to be screwed into the nut aforesaid, a stopperrod having a threaded hole arranged to receive the other end of said stud-bolt, whereby said stopper is secured to said stopper-rod.

3. A refractory stopper provided with a threaded metallic nut secured therein and a hole communicating with the threadedopening of the nut aforesaid, said hole. having, an

enlarged recess at its: upper end, a shoulder formed on the upper portion ofsaid stopper, a stud-bolt adapted to be screwed into the ,nut aforesaid, astopper-rod having a threaded hole arrangedto; receive the other end of said stud-bolt, whereby said stopper is. se-

cured to said stopper-rod.

4. A refractory stopper provided with an internallythreaded metallic. holdingpiece embedded therein, an externally-threaded jrod connected at one. end therewith, and a JOHN H. ALLENDORFER.

Witnesses:

J. R. WEMLINGER, STONE EDELEN, 

